US2709661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of industrial slurries of reduced moisture content in relation to viscosity
Assignee: Hoechst AG
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Filing: 1950-10-06
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Granted: 1955-05-31
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Expires: 1970-10-06
Abstract
No abstract record available.
Inventors
- 👤 Dietz Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/38; C04B7/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
THE PROCESS FOR THE PRODUCTION OF AN AQUEOUS SLURRY OF COMMINUTED ARGILLACEOUS LIMESTONE MATERIAL WHICH, UPON BURNING, PRODUCES CEMENT, SAID SLURRY BEING SUFFICIENTLY FLUID TO PUMP AND CONTAINING A QUANTITY OF WATER OTHERWISE INSUFFICIENT FOR THE PURPOSE, SAID PROCESS COMPRISING ADMIXING WITH ARGILLACEOUS LIMESTONE MATERIAL PRESENT IN SAID SLURRY AN ALKALI METAL POLYPHOSPHATE IN AN AMOUNT RANGING FROM ABOUT 0.003 PER CENT TO ABOUT 0.1 PER CENT., SAID PERCENTAGE BEING BY WEIGHT, BASED ON THE TOTAL WEIGHT OF SAID SLURRY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |